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    <title>5-谷歌-火狐调试器</title>
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        打开网页,鼠标右键-点检查
        左侧小箭头,选中移上去点标签/元素
        单词:
            Elements 元素/标签
            sconsole 控制台
            application 应用
            network 网络请求
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